RT Journal Article SR Electronic T1 Correction: Opioid losses in terms of dosage and value, January 2012 to September 2017: a retrospective analysis of Health Canada data JF CMAJ Open JO CMAJ FD Canadian Medical Association SP E927 OP E927 DO 10.9778/cmajo.20210250 VO 9 IS 4 YR 2021 UL http://www.cmajopen.ca/content/9/4/E927.abstract AB